diff --git a/AndroidMedia/src/main/java/com/frank/androidmedia/controller/AudioEffectController.kt b/AndroidMedia/src/main/java/com/frank/androidmedia/controller/AudioEffectController.kt
index 1c9a3a0..49ae39d 100644
--- a/AndroidMedia/src/main/java/com/frank/androidmedia/controller/AudioEffectController.kt
+++ b/AndroidMedia/src/main/java/com/frank/androidmedia/controller/AudioEffectController.kt
@@ -2,6 +2,7 @@ package com.frank.androidmedia.controller
 
 import android.R
 import android.content.Context
+import android.media.audiofx.BassBoost
 import android.media.audiofx.Equalizer
 import android.media.audiofx.PresetReverb
 import android.util.Log
@@ -32,7 +33,8 @@ open class AudioEffectController(audioEffectCallback: AudioEffectCallback) {
 
     private var mPresetReverb: PresetReverb? = null
     private val reverbValues = ArrayList<String>()
-//    private var seekBarList: List<SeekBar>? = ArrayList()
+
+    private var mBass: BassBoost? = null
 
     private var mAudioEffectCallback: AudioEffectCallback? = null
 
@@ -43,6 +45,9 @@ open class AudioEffectController(audioEffectCallback: AudioEffectCallback) {
         mAudioEffectCallback = audioEffectCallback
     }
 
+    /**
+     * Setup AudioEffect of Equalizer, which has centerFrequency、band、bandLevel
+     */
     fun setupEqualizer(audioSessionId: Int) {
         val equalizerList = ArrayList<Pair<*, *>>()
         mEqualizer = Equalizer(0, audioSessionId)
@@ -59,6 +64,9 @@ open class AudioEffectController(audioEffectCallback: AudioEffectCallback) {
         mAudioEffectCallback?.setEqualizerList(maxEQLevel - minEQLevel, equalizerList)
     }
 
+    /**
+     * Setup preset style, which associates to Equalizer
+     */
     fun setupPresetStyle(context: Context, spinnerStyle: Spinner) {
         for (i in 0 until mEqualizer!!.numberOfPresets) {
             reverbValues.add(mEqualizer!!.getPresetName(i.toShort()))
@@ -86,11 +94,33 @@ open class AudioEffectController(audioEffectCallback: AudioEffectCallback) {
         }
     }
 
+    /**
+     * Setup AudioEffect of BassBoost
+     */
+    fun setupBassBoost(audioSessionId: Int, barBassBoost: SeekBar) {
+        mBass = BassBoost(0, audioSessionId)
+        mBass!!.enabled = true
+        // 0~1000
+        barBassBoost.max = 1000
+        barBassBoost.progress = 0
+        barBassBoost.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+            override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
+                // set the strength of bass boost
+                mBass!!.setStrength(progress.toShort())
+            }
+
+            override fun onStartTrackingTouch(seekBar: SeekBar) {}
+
+            override fun onStopTrackingTouch(seekBar: SeekBar) {}
+        })
+    }
+
     fun onEqualizerProgress(index: Int, progress: Int) {
         mEqualizer!!.setBandLevel(index.toShort(), (progress + minEQLevel).toShort())
     }
 
     fun release() {
+        mBass?.release()
         mEqualizer?.release()
         mPresetReverb?.release()
     }
diff --git a/app/src/main/java/com/frank/ffmpeg/activity/AudioEffectActivity.kt b/app/src/main/java/com/frank/ffmpeg/activity/AudioEffectActivity.kt
index be05b83..c89bf5e 100644
--- a/app/src/main/java/com/frank/ffmpeg/activity/AudioEffectActivity.kt
+++ b/app/src/main/java/com/frank/ffmpeg/activity/AudioEffectActivity.kt
@@ -37,7 +37,6 @@ class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallbac
     }
 
     private var mPlayer: MediaPlayer? = null
-    private var mBass: BassBoost? = null
     private var spinnerStyle: Spinner? = null
     private var spinnerReverb: Spinner? = null
     private var barBassBoost: SeekBar? = null
@@ -58,7 +57,7 @@ class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallbac
         audioEffectController = AudioEffectController(this)
         audioEffectController?.setupEqualizer(mPlayer!!.audioSessionId)
         audioEffectController?.setupPresetStyle(this@AudioEffectActivity, spinnerStyle!!)
-        setupBassBoost()
+        audioEffectController?.setupBassBoost(mPlayer!!.audioSessionId, barBassBoost!!)
         setLoudnessEnhancer()
         setupVisualizer()
 
@@ -115,24 +114,6 @@ class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallbac
         audioEffectController?.onEqualizerProgress(index, progress)
     }
 
-    private fun setupBassBoost() {
-        mBass = BassBoost(0, mPlayer!!.audioSessionId)
-        mBass!!.enabled = true
-        // 0--1000
-        barBassBoost!!.max = 1000
-        barBassBoost!!.progress = 0
-        barBassBoost!!.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
-            override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
-                // set the strength of bass boost
-                mBass!!.setStrength(progress.toShort())
-            }
-
-            override fun onStartTrackingTouch(seekBar: SeekBar) {}
-
-            override fun onStopTrackingTouch(seekBar: SeekBar) {}
-        })
-    }
-
     @RequiresApi(Build.VERSION_CODES.KITKAT)
     private fun setLoudnessEnhancer() {
         loudnessEnhancer = LoudnessEnhancer(mPlayer!!.audioSessionId)
@@ -195,7 +176,7 @@ class AudioEffectActivity : BaseActivity(), OnSeeBarListener, AudioEffectCallbac
     override fun onDestroy() {
         super.onDestroy()
 
-        mBass?.release()
+        audioEffectController?.release()
         loudnessEnhancer?.release()
         releaseVisualizer()
         mPlayer?.release()